Measuring Iodine with Quest and LabCorp Labs

Updated September 12, 2018

While concentrated by the thyroid, iodine is distributed to every cell of the body as T4 as well as the molecule in the blood and urine. The urine and plasma levels of iodine can be measured by Quest and LabCorp. Curiously, almost everyone comes back low.  If, so, where are the high people who are contributing to the range?  Do levels of thryoid hormone affect these levels? Is iodine bound in the blood? By proteins, fats or other more specialized molecules?